https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LZO LanguageManual LZO Skip to end of metadata Created by Lefty Leverenz, last modified on Sep 19, 2017 Go to start of metadata LZO Compression LZO Compression General LZO Concep…
Understanding how Java code is compiled into byte code and executed on a Java Virtual Machine (JVM) is critical because it helps you understand what is happening as your program executes. This understanding not only ensures that language features mak…
[转]Java Code Examples for android.util.JsonReader The following are top voted examples for showing how to use android.util.JsonReader. These examples are extracted from open source projects. You can vote up the examples you like and your votes will b…
Elasticsearch虽然定位为Search Engine,但是因其可以持久化数据,很多时候,我们把Elasticsearch当成Database用,但是Elasticsearch不支持SQL,就需要把SQL逻辑转换成代码实现对应的功能. 以下列举了一些常用的SQL转换成对应的Java代码. 1.按某个field group by查询count SELECT fieldA, COUNT(fieldA) from table WHERE fieldC = "hoge" AND fie…
In order to make the codes looks unified and make it easy to understand, it's better to use the same formatter for our code, the xml is the standard formatter, you can apply it to your STS. open STS -> Window -> type “formatter” -> choose Java -…